Which layer of equipment does the network bridge belong to?

A network bridge is a device belonging to the data link layer. Bridge is a technology that forwards frames into blocks based on MAC to isolate collisions. Bridges connect the same network segments at the data link layer and can only connect to homogeneous networks but not heterogeneous networks.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Bridge is an early two-port Layer 2 network device. The two ports of the bridge each have an independent switching channel instead of sharing a backplane bus, which can isolate conflict domains. The bridge performs better than the hub (Hub). Each port on the hub shares the same backplane bus. Later, bridges were replaced by switches that had more ports and could also isolate conflict domains.

The bridge is like a smart repeater. Repeaters receive signals from one network cable, amplify them, and send them to the next cable. In comparison, the bridge is more sensitive to the information uploaded from the level. Bridge is a technology that forwards frames into blocks based on MAC to isolate collisions. A network bridge connects the same network segment at the data link layer. It can only connect to homogeneous networks (same network segment) and cannot connect to heterogeneous networks (different network segments).

A network bridge, also called a bridge, is a storage/forwarding device that connects two LANs. It can divide a large LAN into multiple network segments, or interconnect more than two LANs into one Logical LAN, which makes the server accessible to all users on the LAN.

The most common way to extend a LAN is to use a bridge. The simplest bridges have two ports, and more complex bridges can have more ports. Each port of the bridge is connected to a network segment.

Advantages of network bridge:

1. Filter traffic. A network bridge can limit the amount of information between workstations on a network segment of a LAN within the scope of this network segment, rather than slipping to other network segments through the network bridge.

2. The physical scope is expanded and the maximum number of workstations on the entire LAN is also increased.

3. Different physical layers can be used to interconnect different LANs.

4. Improved reliability. If a larger LAN is divided into several smaller LANs, and the amount of information within each small LAN is significantly higher than the amount of information between the networks, then the performance of the entire interconnected network will become better.

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